I tried to shut down my PC last night, just to clear memory and because it had been running for 3 days straight, and it got hung on the "Shutting Down" screen for over 10 minutes, so I killed it with the power button. I guess I killed it alright, because the missing boot manager message is all that would come up. Went into Bios and the SSD boot drive was missing. I'm thinking, here we go again (this Crucial M4 is a replacement for the OCZ Vertex 4 that died after 15 days). Swapped SATA ports, rebooted, and it recogcnized it. Swapped them back to the original ports, and still recognizing the drive. But now Windows had a problem locating the boot files, so I had to repair the boot sector with a Windows Repair Disc, and fix other problems like the 100 MB "System Reserved" partition that suddenly showed up in Windows Explorer after I restored a drive image. Anyway, my question is, is anyone else having the disappearing drive problem, and how did you fix it? I'm getting tired of working on this machine every 2 weeks when my brand new SSD decides to exit cyberspace and seek a new life as a paperweight! I never had this problem with mechanical hard drives; SSD's are great, but not worth the trouble if you can't buy one that stays connected. I have a new system with all new parts, that all work great and are completely compatible with each other, which worked perfectly until 2 months in when I installed the first SSD. When that Vertex 4 failed, I asked the salesman which brand and model was experiencing the least amount of returns, and he pointed at the Crucial M4's. Everything I've read since backs up that assessment. 35 days later, the M4 exhibits the same symptoms. I've done all the tweaks for SSD boot drives, and I have the latest firmware, and all my drivers and Windows updates are fresh. Any suggestions or similar anecdotes will be much appreciated.